Numerous scientific researches confirm the fact that mycorrhiza is a very useful symbiosis between roots and fungi. Due to differences in morphology, it is divided into ectomycorrhiza and endomycorrhiza. Endomycorrhiza forms mycellium inside the root tissue and ectomycorrhiza out of the tissue. Such root and fungi association have a large number of positive effects, which are best reflected in poor soils and stress conditions. As the orchards are often planted on poor soils, mycorrhiza may also be necessary for sustainable agriculture. In poor soils it affects the absorption of mineral substances, and most phosphorus. It also contributes to improve water absorption in soils with low content of available water. These two most important effects are a consequence of significantly greater root system biomass but also the ability of fungi to penetrate the hyphae into the smaller soil capillaries in which the root can't penetrate. These two effects indirectly results in better tolerance of plants to stress agroecological conditions such as low and high temperatures, salinity, soil pH and air pollution. The important role od mycorrhiza is to prevent the uptake od heavy metals, which is very important in conventional production. It also affects the prevention of the soil pathogenes. It can be assumed that mycorrhiza can be the key in sustainable agriculture production. It is financially achievable, it reduces the use of expensive mineral fertilizers and pesticides, and provides the plants with favorable balance of nutrients and water, which can be the crucial importance in fruit production